powerpc: Merge 32-bit CHRP support.
SMP still needs more work but UP gets as far as starting userspace
at least. This uses the 64-bit-style code for spinning up the cpus.
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 964ded4..9589d621 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -339,7 +339,7 @@
default n
config MPIC
- depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE
+ depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE || PPC_CHRP
bool
default y
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index cd51fe5..f8673f7 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -207,7 +207,7 @@
.globl __secondary_hold
__secondary_hold:
/* tell the master we're here */
- stw r3,4(0)
+ stw r3,__secondary_hold_acknowledge@l(0)
#ifdef CONFIG_SMP
100: lwz r4,0(0)
/* wait until we're told to start */
@@ -220,6 +220,13 @@
b .
#endif /* CONFIG_SMP */
+ .globl __secondary_hold_spinloop
+__secondary_hold_spinloop:
+ .long 0
+ .globl __secondary_hold_acknowledge
+__secondary_hold_acknowledge:
+ .long -1
+
/*
* Exception entry code. This code runs with address translation
* turned off, i.e. using physical addresses.
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 18d266d..debe973 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -1155,9 +1155,18 @@
*
* -- Cort
*/
+extern void __secondary_hold(void);
+extern unsigned long __secondary_hold_spinloop;
+extern unsigned long __secondary_hold_acknowledge;
+
+/*
+ * We want to reference the copy of __secondary_hold_* in the
+ * 0 - 0x100 address range
+ */
+#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
+
static void __init prom_hold_cpus(void)
{
-#ifdef CONFIG_PPC64
unsigned long i;
unsigned int reg;
phandle node;
@@ -1166,20 +1175,18 @@
unsigned int interrupt_server[MAX_CPU_THREADS];
unsigned int cpu_threads, hw_cpu_num;
int propsize;
- extern void __secondary_hold(void);
- extern unsigned long __secondary_hold_spinloop;
- extern unsigned long __secondary_hold_acknowledge;
+ struct prom_t *_prom = &RELOC(prom);
unsigned long *spinloop
- = (void *) __pa(&__secondary_hold_spinloop);
+ = (void *) LOW_ADDR(__secondary_hold_spinloop);
unsigned long *acknowledge
- = (void *) __pa(&__secondary_hold_acknowledge);
+ = (void *) LOW_ADDR(__secondary_hold_acknowledge);
#ifdef CONFIG_PPC64
+ /* __secondary_hold is actually a descriptor, not the text address */
unsigned long secondary_hold
= __pa(*PTRRELOC((unsigned long *)__secondary_hold));
#else
- unsigned long secondary_hold = __pa(&__secondary_hold);
+ unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
#endif
- struct prom_t *_prom = &RELOC(prom);
prom_debug("prom_hold_cpus: start...\n");
prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
@@ -1197,9 +1204,8 @@
*spinloop = 0;
#ifdef CONFIG_HMT
- for (i = 0; i < NR_CPUS; i++) {
+ for (i = 0; i < NR_CPUS; i++)
RELOC(hmt_thread_data)[i].pir = 0xdeadbeef;
- }
#endif
/* look for cpus */
for (node = 0; prom_next_node(&node); ) {
@@ -1250,34 +1256,22 @@
call_prom("start-cpu", 3, 0, node,
secondary_hold, reg);
- for ( i = 0 ; (i < 100000000) &&
- (*acknowledge == ((unsigned long)-1)); i++ )
+ for (i = 0; (i < 100000000) &&
+ (*acknowledge == ((unsigned long)-1)); i++ )
mb();
- if (*acknowledge == reg) {
+ if (*acknowledge == reg)
prom_printf("done\n");
- /* We have to get every CPU out of OF,
- * even if we never start it. */
- if (cpuid >= NR_CPUS)
- goto next;
- } else {
+ else
prom_printf("failed: %x\n", *acknowledge);
- }
}
#ifdef CONFIG_SMP
else
prom_printf("%x : boot cpu %x\n", cpuid, reg);
-#endif
-next:
-#ifdef CONFIG_SMP
- /* Init paca for secondary threads. They start later. */
- for (i=1; i < cpu_threads; i++) {
- cpuid++;
- if (cpuid >= NR_CPUS)
- continue;
- }
#endif /* CONFIG_SMP */
- cpuid++;
+
+ /* Reserve cpu #s for secondary threads. They start later. */
+ cpuid += cpu_threads;
}
#ifdef CONFIG_HMT
/* Only enable HMT on processors that provide support. */
@@ -1311,7 +1305,6 @@
") exceeded: ignoring extras\n");
prom_debug("prom_hold_cpus: end...\n");
-#endif
}
@@ -1940,7 +1933,6 @@
unsigned long r6, unsigned long r7)
{
struct prom_t *_prom;
- extern char _stext[];
unsigned long hdr;
u32 getprop_rval;
unsigned long offset = reloc_offset();
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 295d5c7..0cac112 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -56,6 +56,10 @@
boot_infos_t *boot_infos;
struct ide_machdep_calls ppc_ide_md;
+/* XXX should go elsewhere */
+int __irq_offset_value;
+EXPORT_SYMBOL(__irq_offset_value);
+
/* Used with the BI_MEMSIZE bootinfo parameter to store the memory
size value reported by the boot loader. */
unsigned long boot_mem_size;
diff --git a/arch/powerpc/platforms/Makefile b/arch/powerpc/platforms/Makefile
index 509622d..01723d4 100644
--- a/arch/powerpc/platforms/Makefile
+++ b/arch/powerpc/platforms/Makefile
@@ -5,6 +5,7 @@
obj-$(CONFIG_PPC_PMAC) += powermac/
endif
endif
+obj-$(CONFIG_PPC_CHRP) += chrp/
obj-$(CONFIG_4xx) += 4xx/
obj-$(CONFIG_85xx) += 85xx/
obj-$(CONFIG_PPC_PSERIES) += pseries/
diff --git a/arch/powerpc/platforms/chrp/Makefile b/arch/powerpc/platforms/chrp/Makefile
new file mode 100644
index 0000000..1fde4e6
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/Makefile
@@ -0,0 +1,3 @@
+obj-y += setup.o time.o pegasos_eth.o
+obj-$(CONFIG_PCI) += pci.o
+obj-$(CONFIG_SMP) += smp.o
diff --git a/arch/powerpc/platforms/chrp/pci.c b/arch/powerpc/platforms/chrp/pci.c
new file mode 100644
index 0000000..82c429d
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/pci.c
@@ -0,0 +1,310 @@
+/*
+ * CHRP pci routines.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+#include <asm/hydra.h>
+#include <asm/prom.h>
+#include <asm/gg2.h>
+#include <asm/machdep.h>
+#include <asm/sections.h>
+#include <asm/pci-bridge.h>
+#include <asm/open_pic.h>
+#include <asm/grackle.h>
+#include <asm/rtas.h>
+
+/* LongTrail */
+void __iomem *gg2_pci_config_base;
+
+/*
+ * The VLSI Golden Gate II has only 512K of PCI configuration space, so we
+ * limit the bus number to 3 bits
+ */
+
+int gg2_read_config(struct pci_bus *bus, unsigned int devfn, int off,
+ int len, u32 *val)
+{
+ volatile void __iomem *cfg_data;
+ struct pci_controller *hose = bus->sysdata;
+
+ if (bus->number > 7)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ /*
+ * Note: the caller has already checked that off is
+ * suitably aligned and that len is 1, 2 or 4.
+ */
+ cfg_data = hose->cfg_data + ((bus->number<<16) | (devfn<<8) | off);
+ switch (len) {
+ case 1:
+ *val = in_8(cfg_data);
+ break;
+ case 2:
+ *val = in_le16(cfg_data);
+ break;
+ default:
+ *val = in_le32(cfg_data);
+ break;
+ }
+ return PCIBIOS_SUCCESSFUL;
+}
+
+int gg2_write_config(struct pci_bus *bus, unsigned int devfn, int off,
+ int len, u32 val)
+{
+ volatile void __iomem *cfg_data;
+ struct pci_controller *hose = bus->sysdata;
+
+ if (bus->number > 7)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ /*
+ * Note: the caller has already checked that off is
+ * suitably aligned and that len is 1, 2 or 4.
+ */
+ cfg_data = hose->cfg_data + ((bus->number<<16) | (devfn<<8) | off);
+ switch (len) {
+ case 1:
+ out_8(cfg_data, val);
+ break;
+ case 2:
+ out_le16(cfg_data, val);
+ break;
+ default:
+ out_le32(cfg_data, val);
+ break;
+ }
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops gg2_pci_ops =
+{
+ gg2_read_config,
+ gg2_write_config
+};
+
+/*
+ * Access functions for PCI config space using RTAS calls.
+ */
+int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
+ int len, u32 *val)
+{
+ struct pci_controller *hose = bus->sysdata;
+ unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
+ | (((bus->number - hose->first_busno) & 0xff) << 16)
+ | (hose->index << 24);
+ int ret = -1;
+ int rval;
+
+ rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len);
+ *val = ret;
+ return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
+}
+
+int rtas_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
+ int len, u32 val)
+{
+ struct pci_controller *hose = bus->sysdata;
+ unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
+ | (((bus->number - hose->first_busno) & 0xff) << 16)
+ | (hose->index << 24);
+ int rval;
+
+ rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL,
+ addr, len, val);
+ return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops rtas_pci_ops =
+{
+ rtas_read_config,
+ rtas_write_config
+};
+
+volatile struct Hydra __iomem *Hydra = NULL;
+
+int __init
+hydra_init(void)
+{
+ struct device_node *np;
+
+ np = find_devices("mac-io");
+ if (np == NULL || np->n_addrs == 0)
+ return 0;
+ Hydra = ioremap(np->addrs[0].address, np->addrs[0].size);
+ printk("Hydra Mac I/O at %lx\n", np->addrs[0].address);
+ printk("Hydra Feature_Control was %x",
+ in_le32(&Hydra->Feature_Control));
+ out_le32(&Hydra->Feature_Control, (HYDRA_FC_SCC_CELL_EN |
+ HYDRA_FC_SCSI_CELL_EN |
+ HYDRA_FC_SCCA_ENABLE |
+ HYDRA_FC_SCCB_ENABLE |
+ HYDRA_FC_ARB_BYPASS |
+ HYDRA_FC_MPIC_ENABLE |
+ HYDRA_FC_SLOW_SCC_PCLK |
+ HYDRA_FC_MPIC_IS_MASTER));
+ printk(", now %x\n", in_le32(&Hydra->Feature_Control));
+ return 1;
+}
+
+void __init
+chrp_pcibios_fixup(void)
+{
+ struct pci_dev *dev = NULL;
+ struct device_node *np;
+
+ /* PCI interrupts are controlled by the OpenPIC */
+ for_each_pci_dev(dev) {
+ np = pci_device_to_OF_node(dev);
+ if ((np != 0) && (np->n_intrs > 0) && (np->intrs[0].line != 0))
+ dev->irq = np->intrs[0].line;
+ pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
+ }
+}
+
+#define PRG_CL_RESET_VALID 0x00010000
+
+static void __init
+setup_python(struct pci_controller *hose, struct device_node *dev)
+{
+ u32 __iomem *reg;
+ u32 val;
+ unsigned long addr = dev->addrs[0].address;
+
+ setup_indirect_pci(hose, addr + 0xf8000, addr + 0xf8010);
+
+ /* Clear the magic go-slow bit */
+ reg = ioremap(dev->addrs[0].address + 0xf6000, 0x40);
+ val = in_be32(®[12]);
+ if (val & PRG_CL_RESET_VALID) {
+ out_be32(®[12], val & ~PRG_CL_RESET_VALID);
+ in_be32(®[12]);
+ }
+ iounmap(reg);
+}
+
+/* Marvell Discovery II based Pegasos 2 */
+static void __init setup_peg2(struct pci_controller *hose, struct device_node *dev)
+{
+ struct device_node *root = find_path_device("/");
+ struct device_node *rtas;
+
+ rtas = of_find_node_by_name (root, "rtas");
+ if (rtas) {
+ hose->ops = &rtas_pci_ops;
+ } else {
+ printk ("RTAS supporting Pegasos OF not found, please upgrade"
+ " your firmware\n");
+ }
+ pci_assign_all_buses = 1;
+}
+
+void __init
+chrp_find_bridges(void)
+{
+ struct device_node *dev;
+ int *bus_range;
+ int len, index = -1;
+ struct pci_controller *hose;
+ unsigned int *dma;
+ char *model, *machine;
+ int is_longtrail = 0, is_mot = 0, is_pegasos = 0;
+ struct device_node *root = find_path_device("/");
+
+ /*
+ * The PCI host bridge nodes on some machines don't have
+ * properties to adequately identify them, so we have to
+ * look at what sort of machine this is as well.
+ */
+ machine = get_property(root, "model", NULL);
+ if (machine != NULL) {
+ is_longtrail = strncmp(machine, "IBM,LongTrail", 13) == 0;
+ is_mot = strncmp(machine, "MOT", 3) == 0;
+ if (strncmp(machine, "Pegasos2", 8) == 0)
+ is_pegasos = 2;
+ else if (strncmp(machine, "Pegasos", 7) == 0)
+ is_pegasos = 1;
+ }
+ for (dev = root->child; dev != NULL; dev = dev->sibling) {
+ if (dev->type == NULL || strcmp(dev->type, "pci") != 0)
+ continue;
+ ++index;
+ /* The GG2 bridge on the LongTrail doesn't have an address */
+ if (dev->n_addrs < 1 && !is_longtrail) {
+ printk(KERN_WARNING "Can't use %s: no address\n",
+ dev->full_name);
+ continue;
+ }
+ bus_range = (int *) get_property(dev, "bus-range", &len);
+ if (bus_range == NULL || len < 2 * sizeof(int)) {
+ printk(KERN_WARNING "Can't get bus-range for %s\n",
+ dev->full_name);
+ continue;
+ }
+ if (bus_range[1] == bus_range[0])
+ printk(KERN_INFO "PCI bus %d", bus_range[0]);
+ else
+ printk(KERN_INFO "PCI buses %d..%d",
+ bus_range[0], bus_range[1]);
+ printk(" controlled by %s", dev->type);
+ if (dev->n_addrs > 0)
+ printk(" at %lx", dev->addrs[0].address);
+ printk("\n");
+
+ hose = pcibios_alloc_controller();
+ if (!hose) {
+ printk("Can't allocate PCI controller structure for %s\n",
+ dev->full_name);
+ continue;
+ }
+ hose->arch_data = dev;
+ hose->first_busno = bus_range[0];
+ hose->last_busno = bus_range[1];
+
+ model = get_property(dev, "model", NULL);
+ if (model == NULL)
+ model = "<none>";
+ if (device_is_compatible(dev, "IBM,python")) {
+ setup_python(hose, dev);
+ } else if (is_mot
+ || strncmp(model, "Motorola, Grackle", 17) == 0) {
+ setup_grackle(hose);
+ } else if (is_longtrail) {
+ void __iomem *p = ioremap(GG2_PCI_CONFIG_BASE, 0x80000);
+ hose->ops = &gg2_pci_ops;
+ hose->cfg_data = p;
+ gg2_pci_config_base = p;
+ } else if (is_pegasos == 1) {
+ setup_indirect_pci(hose, 0xfec00cf8, 0xfee00cfc);
+ } else if (is_pegasos == 2) {
+ setup_peg2(hose, dev);
+ } else {
+ printk("No methods for %s (model %s), using RTAS\n",
+ dev->full_name, model);
+ hose->ops = &rtas_pci_ops;
+ }
+
+ pci_process_bridge_OF_ranges(hose, dev, index == 0);
+
+ /* check the first bridge for a property that we can
+ use to set pci_dram_offset */
+ dma = (unsigned int *)
+ get_property(dev, "ibm,dma-ranges", &len);
+ if (index == 0 && dma != NULL && len >= 6 * sizeof(*dma)) {
+ pci_dram_offset = dma[2] - dma[3];
+ printk("pci_dram_offset = %lx\n", pci_dram_offset);
+ }
+ }
+
+ /* Do not fixup interrupts from OF tree on pegasos */
+ if (is_pegasos == 0)
+ ppc_md.pcibios_fixup = chrp_pcibios_fixup;
+}
diff --git a/arch/powerpc/platforms/chrp/pegasos_eth.c b/arch/powerpc/platforms/chrp/pegasos_eth.c
new file mode 100644
index 0000000..cad5bfa
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/pegasos_eth.c
@@ -0,0 +1,101 @@
+/*
+ * arch/ppc/platforms/chrp_pegasos_eth.c
+ *
+ * Copyright (C) 2005 Sven Luther <sl@bplan-gmbh.de>
+ * Thanks to :
+ * Dale Farnsworth <dale@farnsworth.org>
+ * Mark A. Greer <mgreer@mvista.com>
+ * Nicolas DET <nd@bplan-gmbh.de>
+ * Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ * And anyone else who helped me on this.
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/mv643xx.h>
+#include <linux/pci.h>
+
+/* Pegasos 2 specific Marvell MV 64361 gigabit ethernet port setup */
+static struct resource mv643xx_eth_shared_resources[] = {
+ [0] = {
+ .name = "ethernet shared base",
+ .start = 0xf1000000 + MV643XX_ETH_SHARED_REGS,
+ .end = 0xf1000000 + MV643XX_ETH_SHARED_REGS +
+ MV643XX_ETH_SHARED_REGS_SIZE - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct platform_device mv643xx_eth_shared_device = {
+ .name = MV643XX_ETH_SHARED_NAME,
+ .id = 0,
+ .num_resources = ARRAY_SIZE(mv643xx_eth_shared_resources),
+ .resource = mv643xx_eth_shared_resources,
+};
+
+static struct resource mv643xx_eth0_resources[] = {
+ [0] = {
+ .name = "eth0 irq",
+ .start = 9,
+ .end = 9,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct mv643xx_eth_platform_data eth0_pd;
+
+static struct platform_device eth0_device = {
+ .name = MV643XX_ETH_NAME,
+ .id = 0,
+ .num_resources = ARRAY_SIZE(mv643xx_eth0_resources),
+ .resource = mv643xx_eth0_resources,
+ .dev = {
+ .platform_data = ð0_pd,
+ },
+};
+
+static struct resource mv643xx_eth1_resources[] = {
+ [0] = {
+ .name = "eth1 irq",
+ .start = 9,
+ .end = 9,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct mv643xx_eth_platform_data eth1_pd;
+
+static struct platform_device eth1_device = {
+ .name = MV643XX_ETH_NAME,
+ .id = 1,
+ .num_resources = ARRAY_SIZE(mv643xx_eth1_resources),
+ .resource = mv643xx_eth1_resources,
+ .dev = {
+ .platform_data = ð1_pd,
+ },
+};
+
+static struct platform_device *mv643xx_eth_pd_devs[] __initdata = {
+ &mv643xx_eth_shared_device,
+ ð0_device,
+ ð1_device,
+};
+
+
+int
+mv643xx_eth_add_pds(void)
+{
+ int ret = 0;
+ static struct pci_device_id pci_marvell_mv64360[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_MV64360) },
+ { }
+ };
+
+ if (pci_dev_present(pci_marvell_mv64360)) {
+ ret = platform_add_devices(mv643xx_eth_pd_devs, ARRAY_SIZE(mv643xx_eth_pd_devs));
+ }
+ return ret;
+}
+device_initcall(mv643xx_eth_add_pds);
diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c
new file mode 100644
index 0000000..5145990
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/setup.c
@@ -0,0 +1,523 @@
+/*
+ * arch/ppc/platforms/setup.c
+ *
+ * Copyright (C) 1995 Linus Torvalds
+ * Adapted from 'alpha' version by Gary Thomas
+ * Modified by Cort Dougan (cort@cs.nmt.edu)
+ */
+
+/*
+ * bootup setup stuff..
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/major.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/version.h>
+#include <linux/adb.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/ide.h>
+#include <linux/console.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/initrd.h>
+#include <linux/module.h>
+
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/gg2.h>
+#include <asm/pci-bridge.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/irq.h>
+#include <asm/hydra.h>
+#include <asm/sections.h>
+#include <asm/time.h>
+#include <asm/btext.h>
+#include <asm/i8259.h>
+#include <asm/mpic.h>
+#include <asm/rtas.h>
+#include <asm/xmon.h>
+
+void chrp_get_rtc_time(struct rtc_time *);
+int chrp_set_rtc_time(struct rtc_time *);
+void chrp_calibrate_decr(void);
+long chrp_time_init(void);
+
+void chrp_find_bridges(void);
+void chrp_event_scan(void);
+void rtas_indicator_progress(char *, unsigned short);
+void btext_progress(char *, unsigned short);
+
+int _chrp_type;
+EXPORT_SYMBOL(_chrp_type);
+
+struct mpic *chrp_mpic;
+
+/*
+ * XXX this should be in xmon.h, but putting it there means xmon.h
+ * has to include <linux/interrupt.h> (to get irqreturn_t), which
+ * causes all sorts of problems. -- paulus
+ */
+extern irqreturn_t xmon_irq(int, void *, struct pt_regs *);
+
+extern unsigned long loops_per_jiffy;
+
+#ifdef CONFIG_SMP
+extern struct smp_ops_t chrp_smp_ops;
+#endif
+
+static const char *gg2_memtypes[4] = {
+ "FPM", "SDRAM", "EDO", "BEDO"
+};
+static const char *gg2_cachesizes[4] = {
+ "256 KB", "512 KB", "1 MB", "Reserved"
+};
+static const char *gg2_cachetypes[4] = {
+ "Asynchronous", "Reserved", "Flow-Through Synchronous",
+ "Pipelined Synchronous"
+};
+static const char *gg2_cachemodes[4] = {
+ "Disabled", "Write-Through", "Copy-Back", "Transparent Mode"
+};
+
+void chrp_show_cpuinfo(struct seq_file *m)
+{
+ int i, sdramen;
+ unsigned int t;
+ struct device_node *root;
+ const char *model = "";
+
+ root = find_path_device("/");
+ if (root)
+ model = get_property(root, "model", NULL);
+ seq_printf(m, "machine\t\t: CHRP %s\n", model);
+
+ /* longtrail (goldengate) stuff */
+ if (!strncmp(model, "IBM,LongTrail", 13)) {
+ /* VLSI VAS96011/12 `Golden Gate 2' */
+ /* Memory banks */
+ sdramen = (in_le32(gg2_pci_config_base + GG2_PCI_DRAM_CTRL)
+ >>31) & 1;
+ for (i = 0; i < (sdramen ? 4 : 6); i++) {
+ t = in_le32(gg2_pci_config_base+
+ GG2_PCI_DRAM_BANK0+
+ i*4);
+ if (!(t & 1))
+ continue;
+ switch ((t>>8) & 0x1f) {
+ case 0x1f:
+ model = "4 MB";
+ break;
+ case 0x1e:
+ model = "8 MB";
+ break;
+ case 0x1c:
+ model = "16 MB";
+ break;
+ case 0x18:
+ model = "32 MB";
+ break;
+ case 0x10:
+ model = "64 MB";
+ break;
+ case 0x00:
+ model = "128 MB";
+ break;
+ default:
+ model = "Reserved";
+ break;
+ }
+ seq_printf(m, "memory bank %d\t: %s %s\n", i, model,
+ gg2_memtypes[sdramen ? 1 : ((t>>1) & 3)]);
+ }
+ /* L2 cache */
+ t = in_le32(gg2_pci_config_base+GG2_PCI_CC_CTRL);
+ seq_printf(m, "board l2\t: %s %s (%s)\n",
+ gg2_cachesizes[(t>>7) & 3],
+ gg2_cachetypes[(t>>2) & 3],
+ gg2_cachemodes[t & 3]);
+ }
+}
+
+/*
+ * Fixes for the National Semiconductor PC78308VUL SuperI/O
+ *
+ * Some versions of Open Firmware incorrectly initialize the IRQ settings
+ * for keyboard and mouse
+ */
+static inline void __init sio_write(u8 val, u8 index)
+{
+ outb(index, 0x15c);
+ outb(val, 0x15d);
+}
+
+static inline u8 __init sio_read(u8 index)
+{
+ outb(index, 0x15c);
+ return inb(0x15d);
+}
+
+static void __init sio_fixup_irq(const char *name, u8 device, u8 level,
+ u8 type)
+{
+ u8 level0, type0, active;
+
+ /* select logical device */
+ sio_write(device, 0x07);
+ active = sio_read(0x30);
+ level0 = sio_read(0x70);
+ type0 = sio_read(0x71);
+ if (level0 != level || type0 != type || !active) {
+ printk(KERN_WARNING "sio: %s irq level %d, type %d, %sactive: "
+ "remapping to level %d, type %d, active\n",
+ name, level0, type0, !active ? "in" : "", level, type);
+ sio_write(0x01, 0x30);
+ sio_write(level, 0x70);
+ sio_write(type, 0x71);
+ }
+}
+
+static void __init sio_init(void)
+{
+ struct device_node *root;
+
+ if ((root = find_path_device("/")) &&
+ !strncmp(get_property(root, "model", NULL), "IBM,LongTrail", 13)) {
+ /* logical device 0 (KBC/Keyboard) */
+ sio_fixup_irq("keyboard", 0, 1, 2);
+ /* select logical device 1 (KBC/Mouse) */
+ sio_fixup_irq("mouse", 1, 12, 2);
+ }
+}
+
+
+static void __init pegasos_set_l2cr(void)
+{
+ struct device_node *np;
+
+ /* On Pegasos, enable the l2 cache if needed, as the OF forgets it */
+ if (_chrp_type != _CHRP_Pegasos)
+ return;
+
+ /* Enable L2 cache if needed */
+ np = find_type_devices("cpu");
+ if (np != NULL) {
+ unsigned int *l2cr = (unsigned int *)
+ get_property (np, "l2cr", NULL);
+ if (l2cr == NULL) {
+ printk ("Pegasos l2cr : no cpu l2cr property found\n");
+ return;
+ }
+ if (!((*l2cr) & 0x80000000)) {
+ printk ("Pegasos l2cr : L2 cache was not active, "
+ "activating\n");
+ _set_L2CR(0);
+ _set_L2CR((*l2cr) | 0x80000000);
+ }
+ }
+}
+
+void __init chrp_setup_arch(void)
+{
+ struct device_node *root = find_path_device ("/");
+ char *machine = NULL;
+ struct device_node *device;
+ unsigned int *p = NULL;
+
+ /* init to some ~sane value until calibrate_delay() runs */
+ loops_per_jiffy = 50000000/HZ;
+
+ if (root)
+ machine = get_property(root, "model", NULL);
+ if (machine && strncmp(machine, "Pegasos", 7) == 0) {
+ _chrp_type = _CHRP_Pegasos;
+ } else if (machine && strncmp(machine, "IBM", 3) == 0) {
+ _chrp_type = _CHRP_IBM;
+ } else if (machine && strncmp(machine, "MOT", 3) == 0) {
+ _chrp_type = _CHRP_Motorola;
+ } else {
+ /* Let's assume it is an IBM chrp if all else fails */
+ _chrp_type = _CHRP_IBM;
+ }
+ printk("chrp type = %x\n", _chrp_type);
+
+ rtas_initialize();
+ if (rtas_token("display-character") >= 0)
+ ppc_md.progress = rtas_progress;
+
+#ifdef CONFIG_BOOTX_TEXT
+ if (ppc_md.progress == NULL && boot_text_mapped)
+ ppc_md.progress = btext_progress;
+#endif
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ /* this is fine for chrp */
+ initrd_below_start_ok = 1;
+
+ if (initrd_start)
+ ROOT_DEV = Root_RAM0;
+ else
+#endif
+ ROOT_DEV = Root_SDA2; /* sda2 (sda1 is for the kernel) */
+
+ /* On pegasos, enable the L2 cache if not already done by OF */
+ pegasos_set_l2cr();
+
+ /* Lookup PCI host bridges */
+ chrp_find_bridges();
+
+ /*
+ * Temporary fixes for PCI devices.
+ * -- Geert
+ */
+ hydra_init(); /* Mac I/O */
+
+ /*
+ * Fix the Super I/O configuration
+ */
+ sio_init();
+
+ /* Get the event scan rate for the rtas so we know how
+ * often it expects a heartbeat. -- Cort
+ */
+ device = find_devices("rtas");
+ if (device)
+ p = (unsigned int *) get_property
+ (device, "rtas-event-scan-rate", NULL);
+ if (p && *p) {
+ ppc_md.heartbeat = chrp_event_scan;
+ ppc_md.heartbeat_reset = HZ / (*p * 30) - 1;
+ ppc_md.heartbeat_count = 1;
+ printk("RTAS Event Scan Rate: %u (%lu jiffies)\n",
+ *p, ppc_md.heartbeat_reset);
+ }
+
+ pci_create_OF_bus_map();
+
+ /*
+ * Print the banner, then scroll down so boot progress
+ * can be printed. -- Cort
+ */
+ if (ppc_md.progress) ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0x0);
+}
+
+void
+chrp_event_scan(void)
+{
+ unsigned char log[1024];
+ int ret = 0;
+
+ /* XXX: we should loop until the hardware says no more error logs -- Cort */
+ rtas_call(rtas_token("event-scan"), 4, 1, &ret, 0xffffffff, 0,
+ __pa(log), 1024);
+ ppc_md.heartbeat_count = ppc_md.heartbeat_reset;
+}
+
+/*
+ * Finds the open-pic node and sets up the mpic driver.
+ */
+static void __init chrp_find_openpic(void)
+{
+ struct device_node *np, *root;
+ int len, i, j, irq_count;
+ int isu_size, idu_size;
+ unsigned int *iranges, *opprop = NULL;
+ int oplen = 0;
+ unsigned long opaddr;
+ int na = 1;
+ unsigned char init_senses[NR_IRQS - NUM_8259_INTERRUPTS];
+
+ np = find_type_devices("open-pic");
+ if (np == NULL)
+ return;
+ root = find_path_device("/");
+ if (root) {
+ opprop = (unsigned int *) get_property
+ (root, "platform-open-pic", &oplen);
+ na = prom_n_addr_cells(root);
+ }
+ if (opprop && oplen >= na * sizeof(unsigned int)) {
+ opaddr = opprop[na-1]; /* assume 32-bit */
+ oplen /= na * sizeof(unsigned int);
+ } else {
+ if (np->n_addrs == 0)
+ return;
+ opaddr = np->addrs[0].address;
+ oplen = 0;
+ }
+
+ printk(KERN_INFO "OpenPIC at %lx\n", opaddr);
+
+ irq_count = NR_IRQS - NUM_ISA_INTERRUPTS - 4; /* leave room for IPIs */
+ prom_get_irq_senses(init_senses, NUM_8259_INTERRUPTS, NR_IRQS - 4);
+
+ iranges = (unsigned int *) get_property(np, "interrupt-ranges", &len);
+ if (iranges == NULL)
+ len = 0; /* non-distributed mpic */
+ else
+ len /= 2 * sizeof(unsigned int);
+
+ /*
+ * The first pair of cells in interrupt-ranges refers to the
+ * IDU; subsequent pairs refer to the ISUs.
+ */
+ if (oplen < len) {
+ printk(KERN_ERR "Insufficient addresses for distributed"
+ " OpenPIC (%d < %d)\n", np->n_addrs, len);
+ len = oplen;
+ }
+
+ isu_size = 0;
+ idu_size = 0;
+ if (len > 0 && iranges[1] != 0) {
+ printk(KERN_INFO "OpenPIC irqs %d..%d in IDU\n",
+ iranges[0], iranges[0] + iranges[1] - 1);
+ idu_size = iranges[1];
+ }
+ if (len > 1)
+ isu_size = iranges[3];
+
+ chrp_mpic = mpic_alloc(opaddr, MPIC_PRIMARY,
+ isu_size, NUM_ISA_INTERRUPTS, irq_count,
+ NR_IRQS - 4, init_senses, irq_count,
+ " MPIC ");
+ if (chrp_mpic == NULL) {
+ printk(KERN_ERR "Failed to allocate MPIC structure\n");
+ return;
+ }
+
+ j = na - 1;
+ for (i = 1; i < len; ++i) {
+ iranges += 2;
+ j += na;
+ printk(KERN_INFO "OpenPIC irqs %d..%d in ISU at %x\n",
+ iranges[0], iranges[0] + iranges[1] - 1,
+ opprop[j]);
+ mpic_assign_isu(chrp_mpic, i - 1, opprop[j]);
+ }
+
+ mpic_init(chrp_mpic);
+ mpic_setup_cascade(NUM_ISA_INTERRUPTS, i8259_irq_cascade, NULL);
+}
+
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
+static struct irqaction xmon_irqaction = {
+ .handler = xmon_irq,
+ .mask = CPU_MASK_NONE,
+ .name = "XMON break",
+};
+#endif
+
+void __init chrp_init_IRQ(void)
+{
+ struct device_node *np;
+ unsigned long chrp_int_ack = 0;
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
+ struct device_node *kbd;
+#endif
+
+ for (np = find_devices("pci"); np != NULL; np = np->next) {
+ unsigned int *addrp = (unsigned int *)
+ get_property(np, "8259-interrupt-acknowledge", NULL);
+
+ if (addrp == NULL)
+ continue;
+ chrp_int_ack = addrp[prom_n_addr_cells(np)-1];
+ break;
+ }
+ if (np == NULL)
+ printk(KERN_ERR "Cannot find PCI interrupt acknowledge address\n");
+
+ chrp_find_openpic();
+
+ i8259_init(chrp_int_ack, 0);
+
+ if (_chrp_type == _CHRP_Pegasos)
+ ppc_md.get_irq = i8259_irq;
+ else
+ ppc_md.get_irq = mpic_get_irq;
+
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)
+ /* see if there is a keyboard in the device tree
+ with a parent of type "adb" */
+ for (kbd = find_devices("keyboard"); kbd; kbd = kbd->next)
+ if (kbd->parent && kbd->parent->type
+ && strcmp(kbd->parent->type, "adb") == 0)
+ break;
+ if (kbd)
+ setup_irq(HYDRA_INT_ADB_NMI, &xmon_irqaction);
+#endif
+}
+
+void __init
+chrp_init2(void)
+{
+ request_region(0x20,0x20,"pic1");
+ request_region(0xa0,0x20,"pic2");
+ request_region(0x00,0x20,"dma1");
+ request_region(0x40,0x20,"timer");
+ request_region(0x80,0x10,"dma page reg");
+ request_region(0xc0,0x20,"dma2");
+
+ if (ppc_md.progress)
+ ppc_md.progress(" Have fun! ", 0x7777);
+}
+
+void __init chrp_init(void)
+{
+ ISA_DMA_THRESHOLD = ~0L;
+ DMA_MODE_READ = 0x44;
+ DMA_MODE_WRITE = 0x48;
+ isa_io_base = CHRP_ISA_IO_BASE; /* default value */
+ ppc_do_canonicalize_irqs = 1;
+
+ /* Assume we have an 8259... */
+ __irq_offset_value = NUM_ISA_INTERRUPTS;
+
+ ppc_md.setup_arch = chrp_setup_arch;
+ ppc_md.show_cpuinfo = chrp_show_cpuinfo;
+
+ ppc_md.init_IRQ = chrp_init_IRQ;
+ ppc_md.init = chrp_init2;
+
+ ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
+
+ ppc_md.restart = rtas_restart;
+ ppc_md.power_off = rtas_power_off;
+ ppc_md.halt = rtas_halt;
+
+ ppc_md.time_init = chrp_time_init;
+ ppc_md.set_rtc_time = chrp_set_rtc_time;
+ ppc_md.get_rtc_time = chrp_get_rtc_time;
+ ppc_md.calibrate_decr = chrp_calibrate_decr;
+
+#ifdef CONFIG_SMP
+ smp_ops = &chrp_smp_ops;
+#endif /* CONFIG_SMP */
+}
+
+#ifdef CONFIG_BOOTX_TEXT
+void
+btext_progress(char *s, unsigned short hex)
+{
+ btext_drawstring(s);
+ btext_drawstring("\n");
+}
+#endif /* CONFIG_BOOTX_TEXT */
diff --git a/arch/powerpc/platforms/chrp/smp.c b/arch/powerpc/platforms/chrp/smp.c
new file mode 100644
index 0000000..bf68282
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/smp.c
@@ -0,0 +1,94 @@
+/*
+ * Smp support for CHRP machines.
+ *
+ * Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great
+ * deal of code from the sparc and intel versions.
+ *
+ * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+
+#include <asm/ptrace.h>
+#include <asm/atomic.h>
+#include <asm/irq.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/sections.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/smp.h>
+#include <asm/residual.h>
+#include <asm/time.h>
+#include <asm/open_pic.h>
+#include <asm/machdep.h>
+
+extern unsigned long smp_chrp_cpu_nr;
+
+static int __init smp_chrp_probe(void)
+{
+ if (smp_chrp_cpu_nr > 1)
+ openpic_request_IPIs();
+
+ return smp_chrp_cpu_nr;
+}
+
+static void __devinit smp_chrp_kick_cpu(int nr)
+{
+ *(unsigned long *)KERNELBASE = nr;
+ asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
+}
+
+static void __devinit smp_chrp_setup_cpu(int cpu_nr)
+{
+ if (OpenPIC_Addr)
+ do_openpic_setup_cpu();
+}
+
+static DEFINE_SPINLOCK(timebase_lock);
+static unsigned int timebase_upper = 0, timebase_lower = 0;
+
+void __devinit smp_chrp_give_timebase(void)
+{
+ spin_lock(&timebase_lock);
+ rtas_call(rtas_token("freeze-time-base"), 0, 1, NULL);
+ timebase_upper = get_tbu();
+ timebase_lower = get_tbl();
+ spin_unlock(&timebase_lock);
+
+ while (timebase_upper || timebase_lower)
+ barrier();
+ rtas_call(rtas_token("thaw-time-base"), 0, 1, NULL);
+}
+
+void __devinit smp_chrp_take_timebase(void)
+{
+ while (!(timebase_upper || timebase_lower))
+ barrier();
+ spin_lock(&timebase_lock);
+ set_tb(timebase_upper, timebase_lower);
+ timebase_upper = 0;
+ timebase_lower = 0;
+ spin_unlock(&timebase_lock);
+ printk("CPU %i taken timebase\n", smp_processor_id());
+}
+
+/* CHRP with openpic */
+struct smp_ops_t chrp_smp_ops = {
+ .message_pass = smp_openpic_message_pass,
+ .probe = smp_chrp_probe,
+ .kick_cpu = smp_chrp_kick_cpu,
+ .setup_cpu = smp_chrp_setup_cpu,
+ .give_timebase = smp_chrp_give_timebase,
+ .take_timebase = smp_chrp_take_timebase,
+};
diff --git a/arch/powerpc/platforms/chrp/time.c b/arch/powerpc/platforms/chrp/time.c
new file mode 100644
index 0000000..9e53535
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/time.c
@@ -0,0 +1,188 @@
+/*
+ * arch/ppc/platforms/chrp_time.c
+ *
+ * Copyright (C) 1991, 1992, 1995 Linus Torvalds
+ *
+ * Adapted for PowerPC (PReP) by Gary Thomas
+ * Modified by Cort Dougan (cort@cs.nmt.edu).
+ * Copied and modified from arch/i386/kernel/time.c
+ *
+ */
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/time.h>
+#include <linux/timex.h>
+#include <linux/kernel_stat.h>
+#include <linux/mc146818rtc.h>
+#include <linux/init.h>
+#include <linux/bcd.h>
+
+#include <asm/io.h>
+#include <asm/nvram.h>
+#include <asm/prom.h>
+#include <asm/sections.h>
+#include <asm/time.h>
+
+extern spinlock_t rtc_lock;
+
+static int nvram_as1 = NVRAM_AS1;
+static int nvram_as0 = NVRAM_AS0;
+static int nvram_data = NVRAM_DATA;
+
+long __init chrp_time_init(void)
+{
+ struct device_node *rtcs;
+ int base;
+
+ rtcs = find_compatible_devices("rtc", "pnpPNP,b00");
+ if (rtcs == NULL)
+ rtcs = find_compatible_devices("rtc", "ds1385-rtc");
+ if (rtcs == NULL || rtcs->addrs == NULL)
+ return 0;
+ base = rtcs->addrs[0].address;
+ nvram_as1 = 0;
+ nvram_as0 = base;
+ nvram_data = base + 1;
+
+ return 0;
+}
+
+int chrp_cmos_clock_read(int addr)
+{
+ if (nvram_as1 != 0)
+ outb(addr>>8, nvram_as1);
+ outb(addr, nvram_as0);
+ return (inb(nvram_data));
+}
+
+void chrp_cmos_clock_write(unsigned long val, int addr)
+{
+ if (nvram_as1 != 0)
+ outb(addr>>8, nvram_as1);
+ outb(addr, nvram_as0);
+ outb(val, nvram_data);
+ return;
+}
+
+/*
+ * Set the hardware clock. -- Cort
+ */
+int chrp_set_rtc_time(struct rtc_time *tmarg)
+{
+ unsigned char save_control, save_freq_select;
+ struct rtc_time tm = *tmarg;
+
+ spin_lock(&rtc_lock);
+
+ save_control = chrp_cmos_clock_read(RTC_CONTROL); /* tell the clock it's being set */
+
+ chrp_cmos_clock_write((save_control|RTC_SET), RTC_CONTROL);
+
+ save_freq_select = chrp_cmos_clock_read(RTC_FREQ_SELECT); /* stop and reset prescaler */
+
+ chrp_cmos_clock_write((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT);
+
+ tm.tm_year -= 1900;
+ if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+ BIN_TO_BCD(tm.tm_sec);
+ BIN_TO_BCD(tm.tm_min);
+ BIN_TO_BCD(tm.tm_hour);
+ BIN_TO_BCD(tm.tm_mon);
+ BIN_TO_BCD(tm.tm_mday);
+ BIN_TO_BCD(tm.tm_year);
+ }
+ chrp_cmos_clock_write(tm.tm_sec,RTC_SECONDS);
+ chrp_cmos_clock_write(tm.tm_min,RTC_MINUTES);
+ chrp_cmos_clock_write(tm.tm_hour,RTC_HOURS);
+ chrp_cmos_clock_write(tm.tm_mon,RTC_MONTH);
+ chrp_cmos_clock_write(tm.tm_mday,RTC_DAY_OF_MONTH);
+ chrp_cmos_clock_write(tm.tm_year,RTC_YEAR);
+
+ /* The following flags have to be released exactly in this order,
+ * otherwise the DS12887 (popular MC146818A clone with integrated
+ * battery and quartz) will not reset the oscillator and will not
+ * update precisely 500 ms later. You won't find this mentioned in
+ * the Dallas Semiconductor data sheets, but who believes data
+ * sheets anyway ... -- Markus Kuhn
+ */
+ chrp_cmos_clock_write(save_control, RTC_CONTROL);
+ chrp_cmos_clock_write(save_freq_select, RTC_FREQ_SELECT);
+
+ spin_unlock(&rtc_lock);
+ return 0;
+}
+
+void chrp_get_rtc_time(struct rtc_time *tm)
+{
+ unsigned int year, mon, day, hour, min, sec;
+ int uip, i;
+
+ /* The Linux interpretation of the CMOS clock register contents:
+ * When the Update-In-Progress (UIP) flag goes from 1 to 0, the
+ * RTC registers show the second which has precisely just started.
+ * Let's hope other operating systems interpret the RTC the same way.
+ */
+
+ /* Since the UIP flag is set for about 2.2 ms and the clock
+ * is typically written with a precision of 1 jiffy, trying
+ * to obtain a precision better than a few milliseconds is
+ * an illusion. Only consistency is interesting, this also
+ * allows to use the routine for /dev/rtc without a potential
+ * 1 second kernel busy loop triggered by any reader of /dev/rtc.
+ */
+
+ for ( i = 0; i<1000000; i++) {
+ uip = chrp_cmos_clock_read(RTC_FREQ_SELECT);
+ sec = chrp_cmos_clock_read(RTC_SECONDS);
+ min = chrp_cmos_clock_read(RTC_MINUTES);
+ hour = chrp_cmos_clock_read(RTC_HOURS);
+ day = chrp_cmos_clock_read(RTC_DAY_OF_MONTH);
+ mon = chrp_cmos_clock_read(RTC_MONTH);
+ year = chrp_cmos_clock_read(RTC_YEAR);
+ uip |= chrp_cmos_clock_read(RTC_FREQ_SELECT);
+ if ((uip & RTC_UIP)==0) break;
+ }
+
+ if (!(chrp_cmos_clock_read(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+ BCD_TO_BIN(sec);
+ BCD_TO_BIN(min);
+ BCD_TO_BIN(hour);
+ BCD_TO_BIN(day);
+ BCD_TO_BIN(mon);
+ BCD_TO_BIN(year);
+ }
+ if ((year += 1900) < 1970)
+ year += 100;
+ tm->tm_sec = sec;
+ tm->tm_min = min;
+ tm->tm_hour = hour;
+ tm->tm_mday = day;
+ tm->tm_mon = mon;
+ tm->tm_year = year;
+}
+
+
+void __init chrp_calibrate_decr(void)
+{
+ struct device_node *cpu;
+ unsigned int freq, *fp;
+
+ /*
+ * The cpu node should have a timebase-frequency property
+ * to tell us the rate at which the decrementer counts.
+ */
+ freq = 16666000; /* hardcoded default */
+ cpu = find_type_devices("cpu");
+ if (cpu != 0) {
+ fp = (unsigned int *)
+ get_property(cpu, "timebase-frequency", NULL);
+ if (fp != 0)
+ freq = *fp;
+ }
+ ppc_tb_freq = freq;
+}
diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
index 0eca17d..0037a8c 100644
--- a/arch/powerpc/platforms/powermac/pic.c
+++ b/arch/powerpc/platforms/powermac/pic.c
@@ -71,10 +71,6 @@
static DEFINE_SPINLOCK(pmac_pic_lock);
-/* XXX here for now, should move to arch/powerpc/kernel/irq.c */
-int ppc_do_canonicalize_irqs;
-EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
-
#define GATWICK_IRQ_POOL_SIZE 10
static struct interrupt_info gatwick_int_pool[GATWICK_IRQ_POOL_SIZE];
